решите ур-ия)) 1,4(3-х)-0,9(х+2)=4,7

Question

решите ур-ия)) 1,4(3-х)-0,9(х+2)=4,7

Answer 1

1.4*(3-х)-0.9*(х+2)=4.7

4.2-1.4х-0.9х-1.8=4.7

-2.3х=4.7-4.2+1.8

-2.3х=2.3

х=2.3:(-2.3)

х=-1 

Answer 2

1.4(3-x)-0.9(x+2)=4.7

4.2-1.4x-0.9x-1.8-4.7=0

-2.3x-2.3=0 |*(-1)

2.3x+2.3=0

2.3x=-2.3

x=-1